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<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>ES6 对象方法扩展</title>
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<body>
  <script>
    //1. Object.is 判断两个值是否完全相等
    console.log(Object.is(120, 120))// true
    console.log(Object.is(NaN, NaN))// true
    console.log(NaN === NaN)// false

    // 2.
    // Object.assign
    // 对象的合并
    const config1 = {
      host: 'localhost',
      port: 3306,
      name: 'root',
      pass: 'root',
      test: 'test',
    }
    const config2 = {
      host: 'http://atguigu.com',
      port: 33060,
      name: 'atguigu.com',
      pass: 'iloveyou',
      test2: 'test2',
    }
    console.log(Object.assign(config1, config2))

    //3. Object.setPrototypeOf 设置原型对象  Object.getPrototypeof
    const school = {
      name: '尚硅谷',
    }
    const cities = {
      xiaoqu: ['北京', '上海', '深圳'],
    }
    Object.setPrototypeOf(school, cities)
    console.log(Object.getPrototypeOf(school))
    console.log(school)
  </script>
</body>
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